/Engine/Source/Developer/SourceControl/Public/SourceControlHelpers.h
Helper function to copy a package from one location to another
true if the file packages were successfully branched.
static bool CopyPackage ( [UPackage](API\Runtime\CoreUObject\UObject\UPackage) * DestPackage, [UPackage](API\Runtime\CoreUObject\UObject\UPackage) * SourcePackage, [EStateCacheUsage::Type](API\Developer\SourceControl\EStateCacheUsage__Type) StateCacheUsage )